Barton, C.G. 1977. “Rotating Credit Associations and Informal Finance: Some Examples from South Vietnam.” Conference on Rural Finance Research, San Diego, organized by the A.D.C. and Ohio State University.

Bascom, W.R. 1952. “The Esusu: A Credit Institution of the Yoruba.” Journal of the Royal Anthropological Institute 1: 63-69.

Brundin, Ingela and Mikael Sandstrom, “Savings and Credit in the Informal and Cooperative Financial Sectors in Kenya”, Department of International Economics and Geography, Stockholm School of Economics, minor Field Study # 31, 1992